Servo motor and hub motor dual-purpose brake

Abstract

The utility model relates to the technical field of brakes, and provides a dual-purpose brake for a servo motor and a hub motor, which comprises a stator, a rotor, a brake structure for compressing or loosening the rotor, a first shaft, a second shaft and a shaft sleeve, the shaft sleeve is sleeved on the second shaft, the rotor is sleeved on the shaft sleeve, and the second shaft, the shaft sleeve and the rotor can rotate synchronously. The second shaft is a hollow shaft, and the first shaft is arranged in the second shaft in a penetrating mode and rotationally connected with the second shaft. The first shaft and the second shaft are connected and fixed through radial screws, the first shaft is connected with the stator through a connecting key, and when used for the hub motor, the radial screws are detached, and the shaft sleeve is connected with an output shaft of the hub motor; when used for the servo motor, the connecting key is detached, and the first shaft is connected with the output shaft of the servo motor. The brake provided by the utility model not only can be used on a servo motor, but also can be used on a hub motor, so that the defect that the existing brake is only suitable for one type of motor is overcome.

Description

Technical Field

[0001] This utility model relates to the field of brake technology, and more specifically, to a brake that can be used for both servo motors and hub motors. Background Technology

[0002] In-wheel motors, also known as electric wheels, integrate power, transmission, and braking systems within the wheel hub; this is also referred to as in-wheel motor technology. Servo motors employ closed-loop control systems and are equipped with high-precision encoders and other feedback devices, enabling precise control of the motor's position, speed, and torque. Both types of motors have wide applications in various fields, and both are typically equipped with brakes.

[0003] Designing a universal brake for both servo motors would bring many positive effects (e.g., it would facilitate standardized design for designers and reduce the types of spare parts for users). However, existing brakes often only adapt to one type of motor and cannot be universally compatible with both types. Therefore, how to provide a brake that can be used for both servo motors and hub motors is an urgent problem to be solved in this field. Utility Model Content

[0004] The purpose of this invention is to provide a dual-purpose brake for servo motors and hub motors, in order to solve the problem that existing brakes can only be used with one type of motor.

[0005] This utility model is achieved through the following technical solution:

[0006] A dual-purpose brake for servo motors and hub motors includes a stator, a rotor, and a braking structure for pressing or releasing the rotor. It also includes a first shaft, a second shaft, and a bushing. The bushing is sleeved on the second shaft, and the rotor is sleeved on the bushing. The second shaft, bushing, and rotor can rotate synchronously. The second shaft is a hollow shaft, and the first shaft passes through the second shaft and is rotatably connected to it.

[0007] The first shaft and the second shaft are connected and fixed by radial screws. The first shaft is connected to the stator by a connecting key. When used for a hub motor, the radial screws are removed and the bushing is connected to the output shaft of the hub motor. When used for a servo motor, the connecting key is removed and the first shaft is connected to the output shaft of the servo motor.

[0008] Optionally, the first shaft and the second shaft are connected by bearings.

[0009] Optionally, a radial positioning sleeve is provided between the first shaft and the second shaft, and the radial screw passes through the radial positioning sleeve.

[0010] Optionally, the braking structure includes a flange, a moving plate, and a reset element. The flange and the stator are connected as a whole by a connector. The moving plate is located between the flange and the stator, and the rotor is clamped between the moving plate and the flange.

[0011] Optionally, the connector is a screw.

[0012] Optionally, an axial positioning sleeve is provided between the flange and the stator, and the connecting member passes through the axial positioning sleeve.

[0013] Optionally, the head of the radial screw does not extend beyond the outer surface of the second shaft.

[0014] Optionally, the bushing is provided with a plurality of connecting holes along the circumferential direction.

[0015] The technical solution of this utility model has at least the following advantages and beneficial effects: In this utility model, the brake can be used on both servo motors and hub motors, solving the defect that existing brakes can only be used on one type of motor; when used on a hub motor, the first shaft and the stator are connected by a connecting key, the radial screw between the first shaft and the second shaft is removed, the bushing is connected to the output shaft of the hub motor, the first shaft is connected to the wheel axle and serves as part of the wheel axle, providing support, at this time the second shaft, bushing and rotor are a whole and rotate together; when used on a servo motor, the first shaft and the second shaft are connected and fixed by radial screws, the connecting key between the first shaft and the stator is removed, the first shaft is connected to the output shaft of the servo motor, at this time the first shaft, the second shaft, bushing and rotor are a whole and rotate together. Attached Figure Description

[0016] Figure 1 A front view of a dual-purpose brake for servo motors and hub motors provided by this utility model;

[0017] Figure 2 for Figure 1 AA section view in the middle;

[0018] Reference numerals: 1-First shaft, 2-Second shaft, 3-Bearing, 4-Shaft sleeve, 5-Rotor, 6-Stator, 7-Flange, 8-Moving plate, 9-Radial positioning sleeve, 10-Axial positioning sleeve, 11-Radial screw, 12-Connecting piece. Detailed Implementation

[0019] refer to Figure 1 and Figure 2 A dual-purpose brake for servo motors and hub motors includes a stator 6, a rotor 5, and a braking structure for pressing or releasing the rotor 5, and also includes a first shaft 1, a second shaft 2, and a bushing 4.

[0020] A bushing 4 is fitted onto the second shaft 2, and a rotor 5 is fitted onto the bushing 4. Generally, the bushing 4 and the second shaft 2 are interference-fitted, while the rotor 5 and the bushing 4 are clearance-fitted. The second shaft 2, bushing 4, and rotor 5 can rotate synchronously. The second shaft 2 is a hollow shaft, and the first shaft 1 passes through the second shaft 2 and is rotatably connected to it. Specifically, the first shaft 1 and the second shaft 2 are connected by a bearing 3 to ensure smooth rotation of both. In practical applications, the first shaft 1 is a stepped shaft, and the bearing 3 is fitted onto the small-diameter section of the first shaft 1. The shoulder of the first shaft 1 serves as the positioning point for the bearing 3.

[0021] Alternatively, a radial positioning sleeve 9 is provided between the first shaft 1 and the second shaft 2, through which a radial screw 11 passes. It is worth noting that the radial positioning sleeve 9 facilitates the radial positioning of the first shaft 1 and the second shaft 2, while also preventing the bearing 3 from being excessively compressed when the radial screw 11 is tightened.

[0022] The first shaft 1 is connected to the stator 6 by a connecting key (not shown in the figure), that is, keyways for installing the connecting key are respectively provided on the stator 6 and the first shaft 1; the first shaft 1 and the second shaft 2 are connected and fixed by radial screws 11. Furthermore, the head of the radial screw 11 does not extend beyond the outer surface of the second shaft 2, that is, the hole on the second shaft 2 for installing the radial screw 11 is a countersunk hole, and the head of the radial screw 11 is recessed into it to avoid affecting the installation of other components.

[0023] In practical applications, by removing screws or connecting keys, the brake can be used on both servo motors and hub motors.

[0024] When used in a hub motor, the first shaft 1 and the stator 6 are connected by a connecting key. The radial screw 11 between the first shaft 1 and the second shaft 2 is removed. The bushing 4 is connected to the output shaft of the hub motor. Specifically, the bushing 4 has several connecting holes along the circumferential direction for connecting and fixing to the output shaft of the hub motor by screws. The first shaft 1 is connected to the wheel axle (for example, through a coupling, or directly as part of the wheel axle). As part of the wheel axle, it plays a supporting role. At this time, the second shaft 2, the bushing 4 and the rotor 5 are a whole and rotate together.

[0025] When used in a servo motor, the first shaft 1 and the second shaft 2 are connected and fixed by radial screws 11. The connecting key between the first shaft 1 and the stator 6 is removed, and the first shaft 1 is connected to the output shaft of the servo motor (for example, through a coupling, or directly as part of the output shaft of the servo motor). At this time, the first shaft 1, the second shaft 2, the bushing 4 and the rotor 5 are a whole and rotate together.

[0026] It should be understood that the length of the first shaft 1 in the attached drawing is only schematic; in actual applications, the length of the first shaft 1 can be designed according to actual needs. Similarly, although the first shaft 1 in the attached drawing is a solid shaft, in actual applications it can certainly be designed as a hollow shaft according to requirements.

[0027] Alternatively, in this embodiment, the braking structure includes a flange 7, a moving plate 8, and a reset element. The flange 7 and the stator 6 are connected as a single unit via a connector 12. Furthermore, an axial positioning sleeve 10 is provided between the flange 7 and the stator 6, and the connector 12 passes through the axial positioning sleeve 10. The axial positioning sleeve 10 maintains the axial clearance between the flange 7 and the stator 6. Alternatively, the connector 12 is a screw.

[0028] The moving plate 8 is located between the flange 7 and the stator 6, and the rotor 5 is clamped between the moving plate 8 and the flange 7. Furthermore, it should be understood that an elastic element (such as a spring or sheet) connects the stator 6 and the moving plate 8. The stator 6 is a combination of a magnetic yoke and a coil. When the stator 6 is de-energized, the rotor 5 is pressed between the flange 7 and the moving plate 8 under the elastic force of the elastic element, thus achieving braking. When the stator 6 is energized, the moving plate 8 is attracted by the stator 6, thus releasing the braking.

[0029] In other embodiments, the above-mentioned braking structure can of course be other structures commonly used in brakes, as long as they can achieve the braking by pressing the rotor 5 and releasing the braking by releasing the rotor 5.

[0030] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A brake applicable to both servo motors and hub motors, comprising a stator, a rotor, and a braking structure for clamping or releasing the rotor, characterized in that, It also includes a first shaft, a second shaft, and a bushing. The bushing is fitted onto the second shaft, and the rotor is fitted onto the bushing. The second shaft, the bushing, and the rotor can rotate synchronously. The second shaft is a hollow shaft, and the first shaft passes through the inside of the second shaft and is rotatably connected to it. The first shaft and the second shaft are connected and fixed by radial screws. The first shaft is connected to the stator by a connecting key. When used for a hub motor, the radial screws are removed and the bushing is connected to the output shaft of the hub motor. When used for a servo motor, the connecting key is removed and the first shaft is connected to the output shaft of the servo motor.

2. The dual-purpose brake for servo motors and hub motors according to claim 1, characterized in that, The first shaft and the second shaft are connected by bearings.

3. The dual-purpose brake for servo motors and hub motors according to claim 2, characterized in that, A radial positioning sleeve is provided between the first shaft and the second shaft, and the radial screw passes through the radial positioning sleeve.

4. The dual-purpose brake for servo motors and hub motors according to claim 1, characterized in that, The braking structure includes a flange, a moving plate, and a reset element. The flange and the stator are connected as a whole by a connector. The moving plate is located between the flange and the stator, and the rotor is clamped between the moving plate and the flange.

5. A dual-purpose brake for servo motors and hub motors according to claim 4, characterized in that, The connector is a screw.

6. A dual-purpose brake for servo motors and hub motors according to claim 5, characterized in that, An axial positioning sleeve is provided between the flange and the stator, and the connecting member passes through the axial positioning sleeve.

7. A dual-purpose brake for servo motors and hub motors according to any one of claims 1-6, characterized in that, The head of the radial screw does not extend beyond the outer surface of the second shaft.

8. A dual-purpose brake for servo motors and hub motors according to any one of claims 1-6, characterized in that, The bushing has several connecting holes along the circumferential direction.

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